I wouldn't do that. I own both and they are different lenses. The Sigma IQ is just as good (except for the colors).

When I'm hiking river valleys and forests, I have the 10-20 and my 55-250 IS in my pack, which makes for a versatile and light combo. The 10-20 will be used more often in tight areas such as these. The 17-40 is great, and gets used more often in wider areas such as meadows, lakes and so forth.

Both are first rate landscape lenses with high build quality which inspire confidence. That's why I can't get rid of either, even though I did try the 15-85 IS to replace the 17-40. That didn't work so well.

If I lived in the Bay area I'd be shooting the Redwoods and coast every weekend with the 10-20. Great lens.

50D_Illest wrote in post #12499881Do you guys ever regret getting this lens instead of the 16-35mm? Im thinking about selling my sigma 10-20mm for the 17-40mm. Im just worried that the 17mm on crop wont be wide enough.

It's a tough choice but I think an ultra-wide zoom and the 17-40 suit different preferences. If your shooting habits involve always shooting at your widest, the 17mm will limit you. Personally I wanted the little bit of extra reach so I could use it as a walkaround as a bonus.

rgs- wrote in post #12498938great processing! care to share what you did?

Sure, not a problem, I'm gonna have to guestimate some of the steps though (although I kept the PSD file with named layers at home)...The scene was quite contrasty, so I wanted to HDR it.

1. I took a bracketed shot (-2 - 0 - +2 stops, because of the harsh shadows)2. Very minor editing in Lightroom (basically default import settings + lens correction for vignetting and perspective). 3. Used lightrooms Merge to HDR pro in CS54. Used local adaptation and the settings closely resembling the "Photorealistic" effect, but turned down the shadows a bit.5. Opened the resulting image in Nik Software's Viveza 2. Mainly added "structure" (one of their settings / sliders that increase local contrast by setting control points) to the clouds mostly, as well as the cloud reflections in the car.6. Added a minor curves layer over the top of this.7. added more extreme vignetting.8. Processed to Nik Software's Color Efex pro (Color Stylizer using a brown-ish tint - I think this could quite easily have been done without Nik, but I have it anyway. An alternative could be to create a black-brown-white gradient, perhaps with a mild purple in the dark tints would look great).9. Lowered the opacity of the resulting layer to 65%10. Flattened to a new layer + erased license plate (normally I would do something like this way earlier in the process and also erase everything around that and have only the erased licence plate as a layer, but forgot to do this earlier and someone reminded me...).11. Save to file (I always save a backup with all my layers before sharpening).12. Sharpened (by flattening, changing to LAB color and using unsharp mask on the lightness channel alone).

I think that's all I did, but not 100% sure, sometimes I improvise...If you like I can dig up the original images tonight (at work now).

g-limited wrote in post #12498107Nice PP work. I would've turned the wheel the other way though

Very good point, and I would have done so if I had fancy rims I agree it's a little straight now though.

Love your palace pics, especially the last one, although the white balance is very hot for what it looked like it actually was.

TweakMDS wrote in post #12502257If you like I can dig up the original images tonight (at work now).

Just a small follow up; with originals.

Note that the source images are relatively dark, which - in my experience - works well with automotive HDR's, since it's ok to clip some of the shadows, but the highly specular areas easily blow out. In HDR shots like this I always try to emphasize on containing the highlights. In an architecture shot I'd much sooner shift these all up by one or two stops. If you carefully look at the "middle" exposure, you can see there's still some minor highlight clipping. It's completely gone in the darkest one though.

And for those not wanting to click back, once again the final image linked:

If I look at these, I'm happy with the way it turned out.I'm not so happy with someone who drove into my car yesterday - a car that I owned for exactly 4 days (since last thursday).2000 euros estimated for the repair, but if all goes well, her insurance will cover it (since I was standing still in front of a traffic light...)

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